Sheave block



w. HOUGHTON.

SHEAVE BLOCK.

APPLICATION FILED AUG.I9, I920.

Patented Feb. 14, 1922.

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WILLARD HOUGHTON, F SEATTLE, WASHINGTON.

SHEAVE BLOCK.

Specification of Letters Patent.

Patented Feb. 14, 1922.

Application filed August 19, 1920. Serial No. 404,584.

To (ZZZ-whom it mag concern:

Be it known that I, IVILLARD HoUeH'roN,

' a citizen of the United States, residing at Seattle, in the county ofKing and State of Tashington, have invented certain new and usefulImprovements in Sheave Blocks, of which the following is aspecification.

This invention relates to sheave-blocks. The object of my improvementsis to produce a block of this character which is especially applicablefor use as a snatch-block which should be of light weight, strong,durable, have as few parts as possible and be constructed to obviate anyaccidental dislodgement of the hauling or hoisting rope.

A further object of the invention is the provision in a block ofimproved devices for lubricating the sheave through the medium of aseries of ducts and grease receptacles which are readily replenishedwith grease or an equivalent.

The invention consists in the novel construction, arrangement andcombination of parts as will be hereinafter described and claimed. a

In the accompanying drawings, Figure 1 is a plan view of a blockembodying my invention. Fig. 2 is a similar view, partly in horizontalsection, a portion of the upper cheek member broken away, said memberbeing illustrated in its detachable position.

Fig. 3 is a sectional view through 3-8 of Fig. 2, with the upper cheekmember, shown separated with respect to the other parts of the block.

Fig. 1 is an edge view of the sheave.

In carrying out the invention, I provide a lower cheek member 5 havingan upwardly extending post element 6 which serves as the spindle for asheave 7 and an upper cheek member 8 which is coupled to said lowercheek member to afford housing for said sheave.

One end of each of said cheek members is of a substantially circularform having a diameter slightly greater than the diameter of the sheaveand with its arcuate periphery concentric to the spindle axis. The otherends 5 and 8 of the respective cheek members are each of a correspondingsubstantially triangular shape.

Integral with the cheek member 5 and extending upwardly from it near theextremity of the part '5 thereof is a spacing element 9 having aninwardly directedtongue 10 of a length equal to the width of the element9,

or nearly so.

Integral with the cheek member 8 and extending downwardlytherefrom 1s aspacing element '11 located to have its outer surface- 12 fit againstthe shoulders 13' of the element 9 when the cheek members are in theoperative positions in which they are represented in Fig. 1. The spacingelement 11 is moreover provided with a horizontal groove 14 toaccommodate the tongue 10 of the element 9. i

The two elements 9 and 11 are of the same widths and the inner side ofthe element 11 is rounded as at 15 to obviate the chafing of astrain-rope or cable 16 in an eye 16 of which said elements are engaged.

The upper end of the post 6 extends through a bored aperture 17 providedin the cheek member 8, said post and the upper portion of the bore 17are screw threaded as at 6 and 17 respectively, in such a manner thatthey will interengage when the cheek piece 8 occupies approximatelytheposition in which it is represented by broken lines 8 in Fig. 1 and byfull lines in Fig. 2. Said screw threads are furthermoreadapted to havethe cheek member 8, when swung about the axis of the post in thedirection of arrow A in Fig. 1, screwed down upon the post to enable thegroove 14 to receive the tongue 10. The sheave 7is represented I Saidsheave is formed to provide in its.

upper face a plurality of grease receptacles 22 which communicate byducts 28 with journal of the sheave. Inverted cups 24; inserted in therespective receptacles serve as covers for the latter and are removableby a knife blade or the like when the receptacles are to be charged withgrease. The post 6 is made hollow to also serve as a grease re ceptacle26, the same being closed by a screw plug 25. Theoutlet 27 forreceptacle 26 extends through that side of the post which isdiametrically opposite to the side of the sheave about which the haulingcable 28 passes.

From the foregoing it is apparent that the rope 16 when looped about thecheek elements ments as shown for example in Fig. 2, whereupon the uppercheek member may be swung aroundlnto the position denoted by brokenlines 8 in Fig. l to enable the rope 28 to be taken out through theopening thus p.r0-

vided.

By reason of its strong and rigid construction, the facillty of removingthe hauling cable or rope, its light weight, and the" impossibility ofthe block being opened when under strain, the invention is peculiarlyadapted for use in logging operations as a snatch block. V

lVhat I claim is,

In a block of the characterdescribed, the

combination with a holding rope, asheave, and aspindle for the sheave,of a frame for said sheave, said frame comprising an upper Signed atSeattle, day ofA'ugust,-1920.

and lower cheek 'membery a' spacing block carried by the extreme forwardend of the lowercheek member, said spacing block provided withaninwardly directed tongue, and a spacing block carried by the forward endof the upper cheek member having a groove \VILLARD HOUGHTON. WVitnesses:

PIERRE BARNES;

lvliAneAnn'r G.'SUPPLEL Y

